Electricity: circuit makers and breakers – Limit switch
Patent
1979-12-06
1982-06-01
Little, Willis
Electricity: circuit makers and breakers
Limit switch
200159B, H01H 316, H01H 1370
Patent
active
043329896
ABSTRACT:
A safety arrangement for systems with parts freely movable spatially, in ticular for manipulation devices and driverless transportation devices, includes electric switch elements which upon collision of moved parts with persons or objects cause a control signal which shuts down the moved parts or initiates an emergency operation program which causes for instance a sequence of movements opposite to the direction of collision. Each of the electric switch elements is constituted by a per se known initially electrically insulating plastic layer which turns electrically conductive upon being pressure strained and which is provided planarly between two electrode layers at those locations of the moved parts which as a result of their shapes and motion energy represent a risk upon collision.
REFERENCES:
patent: 3859485 (1975-01-01), Blinklide
patent: 3879586 (1975-04-01), Du Rocher et al.
patent: 3979570 (1976-09-01), Hyodo
patent: 4158117 (1979-06-01), Quilliam et al.
patent: 4200779 (1980-04-01), Zakurdaev et al.
Fraunhofer Gesellschaft zur Forderung der argewandten Forschung
Little Willis
Smith, Jr. John C.
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